Magnetic property and pressure effect of a single crystal CeRhGe

Ueda, Taiki*; Honda, Daisuke*; Shiromoto, Tomoyuki*; Metoki, Naoto   ; Honda, Fuminori*; Kaneko, Koji   ; Haga, Yoshinori   ; Matsuda, Tatsuma; Takeuchi, Tetsuya*; Thamizhavel, A.*; Sugiyama, Kiyohiro*; Kindo, Koichi*; Settai, Rikio*; Onuki, Yoshichika

We measured the electrical resistivity, specific heat, magnetic susceptibility, high-field magnetization, neutron scattering and electrical resistivity under pressure for CeRhGe. The anisotropy of the magnetic susceptibility and magnetization are very large, reflecting the orthorhombic crystal structure. The magnetic easy-axis is found to be oriented along the -axis. From the neutron scattering experiment, the magnetic structure is, however, not simple, indicating an incommensurate antiferromagnetic structure. The magnetic susceptibility and magnetization were analyzed on the basis of the crystalline electric field scheme of localized-4 energy levels, indicating a very large splitting energy of the 4 levels.